You can install strobe lights -- ranging from those resembling disco lights to those on top of emergency vehicles -- to the interior or exterior of your car, depending on your purposes.The actual installation and wiring procedures are simple, but do not drill holes in your car or wire electrical circuits before consulting an experienced mechanic, to obtain best results and to ensure your safety.
Mark the locations inside or outside your car, where you would like to install your strobe lights. If you are installing strobe lights underneath your car, for best results, raise your car on a jack stand. In all cases, you will have to drill holes at the location of installation, so make sure that these locations are away from areas where strobe lights can get easily damaged or dislocated. In particular, avoid hot areas of your car, avoid areas with moving parts, and avoid areas near electrical wiring.
Drill holes in the necessary parts of your vehicle. Be sure to use a drill bit of diameter slightly smaller than the diameters of the screws provided by the strobe light manufacturer. Follow manufacturer's instructions to mount your lights in these locations. You may have to thread larger lights through mounting brackets and use screws to attach mounting brackets to your vehicle. Smaller light installation is simply a matter of threading screws through the lights, and then threading screws through the holes in your car.
Mount a charge control switch, using Velcro or suction cups, on your dashboard. The switch will allow you to toggle your strobe lights on and off.
Disconnect your car battery before you start wiring. Connect the charge controller to your strobe lights, using 12-gauge AWG cable. If connecting to exterior charge lights, you will need to pass the 12-gauge AWG cable through pre-existing holes in the firewall of your car (the wall separating the interior compartment from the engine) to connect it to your strobe light wires.
Connect the positive terminal of your strobe lights to an in-line fuse, using 12-gauge AWG cable. Connect the in-line fuse, using 12-gauge AWG cable, to the positive terminal of your car battery and connect both the negative and ground wires of the 12-gauge AWG cable to the negative terminal of your car battery.
Reconnect your car battery. Your strobe light installation is complete. You now can toggle your lights on and off when the car is running.
Visit the website of your state's motor vehicle department to find out the laws governing the kinds of lights you can add to your vehicle before attempting this project.